超音速电弧喷射雾化制备AgNiCu15-5粉末工艺参数的优化

Preparation Parameters Optimization of Ultrasonic Arc Sprayed AgNiCu15-5 Powder

摘要:

通过正交设计和极差分析研究了超音速电弧喷射雾化制取AgNiCu15-5粉末工艺参数的优化，并运用SEM、XRD对制备的粉末进行了表征。结果表明，影响粉末粒度在25~38 μm范围的质量分数的工艺参数的主次顺序为：雾化距离L＞电弧电流I＞电弧电压U＞雾化气压P；优化的制粉工艺参数为L1I1U2P1，即雾化距离L为250 mm、电弧电流I为100 A、电弧电压U为32 V、雾化气压P为0.8 MPa。在优化的实验条件下，制备出了粒度分布均匀的球形AgNiCu15-5粉末，其中94%以上的粉末粒度小于38 μm

Abstract:

The orthogonal design approach and range analysis were used to investigate the preparation parameters optimization of ultrasonic arc spray (UAS) AgNiCu15-5 powder. The prepared global AgNiCu15-5 powder was characterized by SEM and XRD. The results show that both the spray length (L) and the arc current (I) have great effects, while both the arc voltage (U) and the pressure of atomization gases (P) have less effects on the powder size in the range of 25~38 μm. The optimal process parameters of the fine AgNiCu15-5 alloy powder preparation are given as follows: the spray length is 250 mm, the arc current is 100 A, the arc voltage is 32 V, and the pressure of atomization gases is 0.8 MPa. Under the optimized conditions the prepared AgNiCu15-5 powder possesses global particles with uniform size, more than 94% of which is less than 38 μm